-
Susceptible portions of the tooth are the
pits and fissures on the occlusal surface
-
The first step to sealant placement is to ______ the surface energy of the tooth by ______ which makes the enamel surface _______
- raise
- thoroughly cleaning and etching the enamel
- more wettable
-
Bond an ________ sealant into the pits and fissures
unfilled or lightly filled resin
-
the enamel etchant gel is ____% ______
37% phosphoric acid
-
What is the Armamentarium used for sealants
- Curing Light
- Etching gel with needle tube
- Sealant with needle tube
- Materials to isolate – cotton rolls, Dri-angle
- Floss
- Articulating Paper
- Instrument kit (mirror, explorer)
-
Clean surface of tooth or teeth to be sealed with
- pumice slurry
- prophy cup
- and slow speed handpiece
-
Allow the etchant to remain on the tooth surface for a minimum of
fifteen seconds and a maximum of 60 seconds
-
After rinsing thoroughly and then dry thoroughly the tooth should have a _______ appearance
frosted white
-
The sealant should be placed
ONLY in the grooves
-
Cure with the light for
20 seconds (two beeps).
-
after checking occlusion with _______ what steps should be taken?
- articulating paper
- run floss through teeth to remove excess sealant
- Rinse (taste pretty bad)
-
______ demonstrating the lost wax technique for use in dentistry in 1907
William H. Taggart
-
When taking impressions you usually use an elastomeric material such as _______ and _______ then poured in _____
- polyvinylsiloxane and polyether
- die stone in a vacuum unit to minimize bubbles
-
A die is a
very accurate replica of the prepared tooth or teeth
-
A die spacer is painted on to
allow room for the crown to fit over the tooth and for the luting agent (cement
-
"Wax-up” on the die will ______ and then be converted into ______
- replicate the final restoration
- metal, ceramic and metal, or all ceramic restorations
-
________, _______ and ________ must be finalized at the completion of the wax-up
Margins, occlusion, and contours
-
The sprue forms
a channel through which the molten metal is cast
-
Investment is a ________ product that can stand up very high heat and is _______
- gypsum-like
- poured around the wax entombing the pattern in the stone
-
When the investment dries, the ring is then placed in an _______ leaving a _______
- oven that burns away the wax
- cavity (pattern) in the ring the exact shape of the restoration
-
Explain the casting step
Metal is melted with a torch and flung through the sprue channel into the space left behind by the melted wax
-
What is done in the finishing and polishing step
- Removing the sprue
- Finish contours¢
- Polish to high lustre
-
What are some uses of waxes in dentistry
- Patterns for castings
- Help hold restorations while being repaired
- Lute restorations together when soldering
- Laboratory work
- Denture fabrication
-
What are pattern waxes and what are the types
- The waxes that are used to create a likeness of the restoration to be cast in metal or ceramic, or processed into acrylic in the case of dentures
- A. Inlay
- B. Casting
- C. Base Plate
-
Inlay wax are used to create
inlays, onlays, crowns, bridges, posts, implant abutments or any restoration to be cast in metal
-
What is casting wax
Preformed patterns for the creation of partial denture frame-works
-
What is Base plate wax
Versatile sheets of brittle wax that hold denture teeth when preparing a denture set up and provide a model of gingiva, soft tissue, and many other function
-
What are processing waxes and what are the different types
- Used in laboratory procedures to help fabricate or repair restorations
- Boxing/Beading wax
- Periphery wax
- Sticky wax
-
What is Boxing/Beading wax used for
used on models when fabricating dentures
-
What is periphery wax used for
used on impression trays to add an area or help create the periphery of the impression
-
What is sticky wax used for
wax-used for luting together pieces when soldering, performing a repair, or mounting models on an articulator
-
What types of waxes are these 
- A. boxing
- B. periphery
- C. sticky
-
What are the two types of impression waxes
- A. Adaptol
- B.Bite Registration Wax
-
What is adaptol used for
Used to border mold a denture impression producing a clean clear impression of the mucobuccal fold
-
Waxes are mostly replaced by ______
elastomeric impression materials
-
Waxes are a mixture of
natural (beeswax/paraffin/ carnauba) and synthetic waxes
-
When burned out in an oven, certain waxes leave _______ which is the key to the ______
- no ash or residue
- lost-wax technique
-
Flow
- The change in shape in response to applied force
- At low temperatures, there is very little flow
-
Thermal Expansion-
Waxes expand greatly when heated-more so than any other material
-
Residual Stress
Stresses build up in the mass of wax as a result of handling – carving, heating, cooling
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